Compound filter (sum of proper divisors & prime signature): a(n) = P(A001065(n), A046523(n)), where P(n,k) is sequence A000027 used as a pairing function.

A291765

Compound filter (sum of proper divisors & prime signature): a(n) = P(A001065(n), A046523(n)), where P(n,k) is sequence A000027 used as a pairing function.

Terms

a(0) =

a(1) =

a(2) =

a(3) =

a(4) =

a(5) =

a(6) =

a(7) =

a(8) =

a(9) =

a(10) =

a(11) =

a(12) =

a(13) =

a(14) =

a(15) =

a(16) =

a(17) =

a(18) =

a(19) =

a(20) =

a(21) =

a(22) =

a(23) =

a(24) =

a(25) =

a(26) =

a(27) =

a(28) =

a(29) =

External references

oeis: A291765